/**************************************************************************
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*
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* Copyright 2008 VMware, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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/**
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* @file
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* Platform independent functions for string manipulation.
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*
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* @author Jose Fonseca <jfonseca@vmware.com>
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*/
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#ifndef U_STRING_H_
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#define U_STRING_H_
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#if !defined(XF86_LIBC_H)
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#include <stdio.h>
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#endif
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#include <stdlib.h>
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#include <stddef.h>
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#include <stdarg.h>
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#include <string.h>
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#include "util/macros.h" // PRINTFLIKE
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef _GNU_SOURCE
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#define util_strchrnul strchrnul
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#else
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static inline char *
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util_strchrnul(const char *s, char c)
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{
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for (; *s && *s != c; ++s);
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return (char *)s;
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}
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#endif
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#ifdef _WIN32
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static inline int
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util_vsnprintf(char *str, size_t size, const char *format, va_list ap)
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{
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/* We need to use _vscprintf to calculate the length as vsnprintf returns -1
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* if the number of characters to write is greater than count.
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*/
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va_list ap_copy;
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int ret;
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va_copy(ap_copy, ap);
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ret = _vsnprintf(str, size, format, ap);
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if (ret < 0) {
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ret = _vscprintf(format, ap_copy);
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}
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return ret;
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}
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static inline int
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PRINTFLIKE(3, 4)
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util_snprintf(char *str, size_t size, const char *format, ...)
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{
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va_list ap;
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int ret;
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va_start(ap, format);
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ret = util_vsnprintf(str, size, format, ap);
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va_end(ap);
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return ret;
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}
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static inline void
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util_vsprintf(char *str, const char *format, va_list ap)
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{
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util_vsnprintf(str, (size_t)-1, format, ap);
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}
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static inline void
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PRINTFLIKE(2, 3)
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util_sprintf(char *str, const char *format, ...)
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{
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va_list ap;
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va_start(ap, format);
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util_vsnprintf(str, (size_t)-1, format, ap);
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va_end(ap);
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}
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static inline int
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util_vasprintf(char **ret, const char *format, va_list ap)
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{
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va_list ap_copy;
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/* Compute length of output string first */
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va_copy(ap_copy, ap);
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int r = util_vsnprintf(NULL, 0, format, ap);
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va_end(ap_copy);
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if (r < 0)
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return -1;
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*ret = (char *) malloc(r + 1);
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if (!ret)
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return -1;
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/* Print to buffer */
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return util_vsnprintf(*ret, r + 1, format, ap);
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}
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static inline char *
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util_strchr(const char *s, char c)
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{
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char *p = util_strchrnul(s, c);
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return *p ? p : NULL;
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}
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static inline char*
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util_strncat(char *dst, const char *src, size_t n)
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{
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char *p = dst + strlen(dst);
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const char *q = src;
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size_t i;
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for (i = 0; i < n && *q != '\0'; ++i)
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*p++ = *q++;
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*p = '\0';
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return dst;
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}
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static inline int
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util_strcmp(const char *s1, const char *s2)
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{
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unsigned char u1, u2;
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while (1) {
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u1 = (unsigned char) *s1++;
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u2 = (unsigned char) *s2++;
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if (u1 != u2)
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return u1 - u2;
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if (u1 == '\0')
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return 0;
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}
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return 0;
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}
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static inline int
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util_strncmp(const char *s1, const char *s2, size_t n)
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{
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unsigned char u1, u2;
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while (n-- > 0) {
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u1 = (unsigned char) *s1++;
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u2 = (unsigned char) *s2++;
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if (u1 != u2)
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return u1 - u2;
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if (u1 == '\0')
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return 0;
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}
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return 0;
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}
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static inline char *
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util_strstr(const char *haystack, const char *needle)
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{
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const char *p = haystack;
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size_t len = strlen(needle);
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for (; (p = util_strchr(p, *needle)) != 0; p++) {
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if (util_strncmp(p, needle, len) == 0) {
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return (char *)p;
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}
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}
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return NULL;
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}
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#define util_strcasecmp stricmp
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#define util_strdup _strdup
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#else
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#define util_vsnprintf vsnprintf
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#define util_snprintf snprintf
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#define util_vsprintf vsprintf
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#define util_vasprintf vasprintf
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#define util_sprintf sprintf
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#define util_strchr strchr
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#define util_strcmp strcmp
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#define util_strncmp strncmp
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#define util_strncat strncat
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#define util_strstr strstr
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#define util_strcasecmp strcasecmp
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#define util_strdup strdup
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* U_STRING_H_ */
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